High severity7.5NVD Advisory· Published May 9, 2019· Updated Jun 17, 2026
CVE-2019-11842
CVE-2019-11842
Description
An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
matrix-sydentPyPI | < 1.0.3 | 1.0.3 |
matrix-synapsePyPI | < 0.99.3.1 | 0.99.3.1 |
Affected products
3- Matrix/Sydentdescription
- ghsa-coords2 versions
< 1.0.3+ 1 more
- (no CPE)range: < 1.0.3
- (no CPE)range: < 0.99.3.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-gwf7-vfjf-wf6xghsaADVISORY
- matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-a/nvdVendor Advisory
- nvd.nist.gov/vuln/detail/CVE-2019-11842ghsaADVISORY
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-185.yamlghsaWEB
- matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-aghsaWEB
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